Flow Switch – In-line Model Q-4E | Fluid Flow and Liquid Level Switches

Flow Switch – In-line Model Q-4E

Monitoring flow of coolants and fluids supplied to:

Air Conditioning Systems
Plastic Molding Equipment
Cooling in Data Centers
Scrubbers
Diodes, SCRs, Triacs, etc.
Spot Welders
Fluid Blending Systems
Transformers
High Power Transistors
Vacuum Systems
Railroad Engine Lubrication Systems

Other Uses:

Monitor Filter Clogging
Starting Back-up Pumps Fire Sprinkler Flow Alarms

ORIFICE/ PADDLE #	CONTINUOUS SWITCH POINT ADJUSTMENT RANGE
1	4 to 8 GPM
2	6 to 20 GPM
3	15 to 35 GPM
4	25 to 70 GPM

HYSTERESIS (Δ FLOW RATE TO ACTIVATE/DEACTIVATE SWITCH)
≈ 5% at upper end of flow range
≈ 25% at lower end of flow range

DIFFERENTIAL PRESSURE DROPS ACROSS UNIT
Under normal operating conditions:
≈ 1.0 psig at upper end of flow range
≈ 5.0 psig at lower end of flow range

WORKING LINE PRESSURE
300 psig max. @ 180˚F max (Proof tested to 1,200 psi @ 70˚F)

WORKING TEMPERATURE
180˚F max. (May be extended to 200˚F for short periods.)

WETTED MATERIALS
Body: Red brass Hardware: Noryl® (PPO) (10% glass fibers), Plastic Working fluid “sees” red brass, phosphor bronze, and EPDM Elastomer Seal Gasket: Cork/Nitrile blend Optional Seal: Hypalon, Viton® or FKM

ELECTRICAL SWITCH CHARACTERISTICS
SPDT (single pole double throw) 15A, 1/2 hp @ 125 or 250VAC .A @ 125VDC, .A @ 250VDC 5A @ 125VAC (tungsten lamp load) 10,000,000 Operations Median Switch may be overloaded to 20A @ 125 or 250VAC for a minimum of 20,000 operations. Model Q-4E can also be fitted with a SPDT Gold Cross Bar Switch for computer/PLC interface.

Q4 Group
	Q-4E